#### Autocorelation Observation for US GEO Region * The results show that the test statistic value -3.22 is greater than the critical value at 1% of -3.518. This suggests that we cannot reject the null hypothesis and can conclude that the process has a unit root, and in turn that the time series is not stationary * The autocorrelations show significant lags and decline slowly. * The PACF shows a significant lag for 1 month, with perhaps some significant lag at 8th month. * Both the ACF and PACF show a drop off at the same point, perhaps suggesting a mix of AR and MA.